Fifty years ago the late Jim Linzell and I were writing our monograph, Salt Glands in Birds and Reptiles, for the Physiological Society's Monograph Series; it was published in May 1975. In this series I revisit some of the topics and people who followed up the discovery of salt glands in birds by Knut Schmidt-Nielsen.
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I was sad to find that Maryanne Robinson Hughes had died in 2020 just short of her 90th birthday. Maryanne was in right at the beginning of the discovery of salt glands in birds since she was Knut Schmidt-Nielsen’s PhD student at Duke University in North Carolina and in 1958 was a co-author of the second full paper, with Knut and Ragnar Fänge, to appear on salt glands in birds in which they established the nervous control of the gland.
An obituary online written by one of her three children, together with a page on ancestry.com provides an outline of her life. Maryanne Elizabeth Robinson was born on 27 December 1930 in Binghampton, New York. She was educated at Binghampton Central High School and Harpur College. A masters and PhD at Duke then followed. Her PhD was awarded in 1962 but from newspaper articles on her engagement it would seem that while writing up she had been employed as a research assistant in the physiology department of the University of Washington in Seattle. On 26 August 1961 she married Gilbert C Hughes (1933-2010) in New York; they went to live in Kansas where Gil was an assistant professor. In 1964 the moved across the Canadian border, Gil to the Department of Botany of the University of British Columbia in Vancouver where he worked on marine fungi. I remember Maryanne telling me that with a young family she first worked part-time in the Department of Zoology where she stayed until retirement. Maryanne died in a care home in Vancouver on 10 December 2020.
I met Maryanne only once; at a dinner with Gil, during the Physiological Congress on the UBC Campus in Vancouver, where I chaired a session on salt glands, a memorable occasion (the dinner not the session) with them both in fine form. Maryanne continued working on birds with salt glands for her entire career with a string of postgraduate students and other collaborators. She was particularly concerned with the integration of function of all the organs and tissues concerned with osmoregulation and water balance, a very difficult job given the nature of urinary excretion and the admixture of urine and faeces in the hindgut of birds.
I have gathered Maryanne’s publications in the following list from my own records and all the usual sources. Her first paper was published when she was 27; her last when she was 76. However, because the indexing services often miss (even with the benefit of machine-learning) many publications in books and conference proceedings, the list may not be complete. Some of Maryanne’s papers in my own records have not been picked up.
Maryanne Robinson Hughes: Publications 1958-2007
Fänge R, Schmidt-Nielsen K, Robinson M. 1958. Control of secretion from the avian salt gland. American Journal of Physiology 195, 321-326.
Hughes MR. 1962. Studies on renal and extrarenal salt excretion in gulls and terns. PhD thesis, Duke University, North Carolina.
Goldstein DL, Hughes MR, Braun EJ. 1966. Role of the lower intestine in the adaptation of gulls (Larus glaucescens) to sea water. Journal of Experimental Biology 123, 345-357.
Hughes MR. 1968. Renal and extrarenal excretion in the common tern Sterna hirundo. Physiological Zoölogy 41, 210-219.
Hughes MR, Ruch FE. 1968. Sodium and potassium in the tears and salt gland secretion of saline acclimatized ducks. Proceedings of the International Union of Physiological Sciences 7, 204 (24th International Congress, Washington, D.C.).
Hughes MR. 1969. Ionic and osmotic concentration of tears of the gull, Larus glaucescens. Canadian Journal of Zoology 47, 1337-1339.
Hughes MR, Ruch FE. 1969. Sodium and potassium in spontaneously produced salt-gland secretion and tears of ducks, Anas platyrhynchos, acclimated to fresh and saline waters. Canadian Journal of Zoology 47, 1133-1138.
Hughes MR. 1970. Flow rate and cation concentration in salt gland secretions of the glaucous-winged gull, Larus glaucescens. Comparative Biochemistry and Physiology 32, 807-812.
Hughes MR. 1970. Relative kidney size in nonpasserine birds with functional salt glands. Condor 72, 164-168.
Hughes MR. 1970. Some observations on ion and water balance in the puffin, Fratercula arctica. Canadian Journal of Zoology 48, 479-482.
Hughes MR. 1970. Cloacal and salt-gland ion excretion in the seagull, Larus glaucescens, acclimated to increasing concentrations of sea water. Comparative Biochemistry and Physiology 32, 315-25.
Hughes MR. 1972. The effect of salt gland removal on cloacal ion and water excretion in the growing kittiwake, Rissa tridactyla. Canadian Journal of Zoology 50, 603-610.
Hughes MR. 1972. Hypertonic salt gland secretion in the glaucous-winged gull, Larus glaucescens, in response to stomach loading with dilute sodium chloride. Comparative Biochemistry and Physiology A 41. 121-127.
Hughes MR, Blackman JG. 1973. Cation content of salt gland secretion and tears in the Brolga, Grus rubicundus (Perry) (Aves: Gruidae). Australian Journal of Zoology 21, 515-518.
Hughes MR. 1974. Water content of the salt glands and other avian tissues. Comparative Biochemistry and Physiology A 47, 1089-1093.
Hughes MR. 1975. Salt gland secretion produced by the gull, Larus glaucescens in response to stomach loads of different sodium and potassium concentration. Comparative Biochemistry and Physiology A 51, 909-913.
Ruch FE Jr, Hughes MR. 1975. The effects of hypertonic sodium chloride injection on body water distribution in ducks (An as platyrhynchos), gulls (Larus glaucesens) and roosters (Gallus domesticus). Comparative Biochemistry and Physiology A 52, 21-28.
Hughes MR. 1976. Effect of glucose on salt gland secretion in the glaucous-winged gull, Larus glaucescens. Comparative Biochemistry and Physiology A 53, 311-312.
Hughes MR. 1976. The effects of salt water adaptation on the Australian black swan, Cygnus atratus (Latham). Comparative Biochemistry and Physiology A 55, 271-277.
Hughes MR. 1977. Observations on osmoregulation in glaucous-winged gulls, Larus glaucescens, following removal of the supraorbital salt glands. Comparative Biochemistry and Physiology 37A, 281-287.
Walter A, Hughes MR. 1978. Total body water volume and turnover rate in fresh water and sea water adapted glaucous-winged gulls, Larus glaucescens. Comparative Biochemistry and Physiology 61A, 233-237.
Hughes MR. 1980. Glomerular filtration rate in saline acclimated ducks, gulls and geese. Comparative Biochemistry and Physiology 65A, 211-213.
Roberts JR, Hughes MR. 1983. Glomerular filtration rate and drinking rate in Japanese Quail, Coturnix coturnix japonica, in response to acclimation to saline water. Canadian Journal of Zoology 61, 2394-2398.
Roberts JR, Hughes MR. 1983. The effect of saline acclimation on water and sodium transport across the small intestine of ducklings, gulls and quail. American Zoologist 23, 1014.
Roberts JR, Hughes MR. 1984. Exchangeable sodium pool size and sodium turnover in freshwater- and saltwater-acclimated ducks and gulls. Canadian Journal of Zoology 62, 2142-2145.
Roberts JR, Hughes MR. 1984. Saline acclimation and water and sodium transport across avian small intestine. American Journal of Physiology 247, R246-249.
Hughes MR. 1987. The effects of ureteral resistance on gull urine composition and flow rate. Canadian Journal of Zoology 65, 2669-2671.
Hughes MR, Roberts JR, Thomas BR. 1987. Total body water and Its turnover in free-living nestling glaucous-winged gulls with a comparison of body water and water flux in avian species with and without salt glands. Physiological Zoology 60, 481-491.
Conway GL, Hughes MR, Moldenhauer RR. 1988. Extrarenal salt excretion in clapper and king rails. Comparative Biochemistry and Physiology A 91, 671-674.
Hammons RL, Hughes MR, Moldenhauer RR. 1988. Body water and water flux in fresh water and sea-water acclimated clapper rails, Rallus longirostris. Comparative Biochemistry and Physiology A 91, 539-541.
Hughes MR, Roberts JR, Thomas BR. 1989. Renal function in freshwater and chronically saline-stressed male and female Pekin ducks. Poultry Science 68, 408-416.
Hughes MR. 1989. Extracellular fluid volume and the initiation of salt gland secretion in ducks and gulls. Canadian Journal of Zoology 64, 194-197.
Hughes MR, Chadwick A. (Editors) 1989. Progress in Avian Osmoregulation. Leeds: Leeds Philosophical and Literary Society.
Hughes MR. 1989. Stimulus for avian salt gland secretion. In, Progress in Avian Osmoregulation. Edited by MR Hughes and A Chadwick, pp 143-161. Leeds: Leeds Philosophical and Literary Society.
Hughes MR, Kasserra C, Thomas BR. 1990. Effect of externally applied bunker fuel on body mass and temperature, plasma concentration, and water flux of Glaucous-winged Gulls, Larus glaucescens. Canadian Journal of Zoology 68, 716-721.
Hughes MR, Winkler D. 1990. Osmoregulation in nestling California gulls at Mono Lake, California. Comparative Biochemistry and Physiology A 95, 567-571.
Kasserra CE, Jones DR, Hughes MR. 1991. Acid-base disturbance and ventilatory response to changes in plasma osmolality in Pekin ducks. Respiration Physiology 85, 383-393.
Hughes MT, Zenteno-Savin T, Kojwang D. 1991. Effects of saline acclimation and cecal ligation on body water and water flux in male and female Pekin ducks. Canadian Journal of Zoology 69, 771-775.
Hughes MR, Kojwang D, Zenteno-Savin T. 1992. Effects of caecal ligation and saline acclimation on plasma concentration and organ mass in male and female Pekin ducks, Anas platyrhynchos. Journal of Comparative Physiology B 162, 625-631.
Bennett DC, Bowes VA, Hughes MR, Hart LE. 1992. Suspected sodium toxicity in hand-reared great blue heron (Ardea herodias) chicks. Avian Diseases. 36, 743-748.
Kojwang D, Hughes MR. 1993 High dietary sodium chloride and body temperature in the domestic fowl and the glaucous-winged gull. Journal of Comparative Physiology B 163, 421-426.
Hughes MR, Goldstein DL, Raveendran L. 1993. Osmoregulatory responses of glucous-winged gulls (Larus glaucescens) to dehydration and hemorrhage. Journal of Comparative Physiology B. 163, 524-31.
Hughes MR. 1995. Responses of gull kidneys and salt glands to NaCl loading. Canadian Journal of Physiology and Pharmacologu 73, 1727-1732.
Bennett DC, Hughes MR, De Sobrino CN, Gray DA. 1997. Interaction of osmotic and volemic components in initiating salt-gland secretion in Pekin ducks. Auk 114, 242-248.
Ching AC, Hughes MR, Poon AM, Pang SF. 1999. Melatonin receptors and melatonin inhibition of duck salt gland secretion. General and Comparative Endocrinology 116, 229-240.
Bennett DC, Hughes MR, Elliott JE, Scheuhammer AM, Smits JE. 2000. Effect of cadmium on Pekin duck total body water, water flux, renal filtration, and salt gland function. Journal of Toxicology and Environmental Health A. 59, 43-56.
Hughes MR, Smits JE, Elliott JE, Bennett DC. 2000. Morphological and pathological effects of cadmium ingestion on Pekin ducks exposed to saline. Journal of Toxicology and Environmental Health A. 61, 591-608.
Hughes MR, Bennett DC, Gray DA, Sharp PJ, Scheuhammer AM, Elliott JE. 2003. Effects of cadmium ingestion on plasma and osmoregulatory hormone concentrations in male and female Pekin ducks. Journal of Toxicology and Environmental Health A 66, 565-579.
Hughes MR. 2003.Regulation of salt gland, gut and kidney interactions. Comparative Biochemistry and Physiology A 136, 507-524.
Bennett DC, Hughes MR. 2003. Comparison of renal and salt gland function in three species of wild ducks. Journal of Experimental Biology 206, 3273-3284.
Bennett DC, Gray DA, Hughes MR. 2003. Effect of saline intake on water flux and osmotic homeostasis in Pekin ducks (Anas platyrhynchos). Journal of Comparative Physiology B. 173, 27-36.
Bennett DC, Kojwang D, Sullivan TM, Gray DA, Hughes MR. 2003. Effect of saline acclimation on body water and sodium compartmentalization in Pekin ducks (Anas platyrhynchos). Journal of Comparative Physiology B. 173, 21-26.
Hughes MR, Bennett DC. 2004. Effect of saline intake, sex and season on Pekin duck osmoregulatory organ masses and comparison with wild Mallards. Canadian Journal of Zoology 82, 30-40.
Bennett DC, Gray DA, Sharp PJ, Hughes MR. 2005. Redistribution of extracellular water and sodium may contribute to saline tolerance in wild ducks. Physiological and Biochemical Zoology 78, 447-455.
Hughes MR, Bennett DC, Gray DA, Sharp PJ, Poon AM. 2006. Influences of sex and saline intake on diurnal changes in plasma melatonin and osmoregulatory hormones of Pekin ducks (Anas platyrhynchos). General Comparative Endocrinology 149,124-133
Hughes MR, Kitamura N, Bennett DC, Gray DA, Sharp PJ, Poon AM. 2007. Effect of melatonin on salt gland and kidney function of gulls, Larus glaucescens. General and Comparative Endocrinology 151, 300-307.